1115540556 has 72 divisors (see below), whose sum is σ = 2835220752. Its totient is φ = 339360000.

The previous prime is 1115540551. The next prime is 1115540557. The reversal of 1115540556 is 6550455111.

It is not an unprimeable number, because it can be changed into a prime (1115540551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1591006 + ... + 1591706.

It is an arithmetic number, because the mean of its divisors is an integer number (39378066).

Almost surely, 2^1115540556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115540556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417610376).

1115540556 is an abundant number, since it is smaller than the sum of its proper divisors (1719680196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115540556 is a wasteful number, since it uses less digits than its factorization.

1115540556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

The square root of 1115540556 is about 33399.7089208873. The cubic root of 1115540556 is about 1037.1186752899.

Adding to 1115540556 its reverse (6550455111), we get a palindrome (7665995667).

The spelling of 1115540556 in words is "one billion, one hundred fifteen million, five hundred forty thousand, five hundred fifty-six".